Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
APRS station AC3JM-7 - show graphs
Mic-E message: Off duty
Location: 39°18.85' N 77°20.45' W - locator FM19HH95CJ - show map
8.8 km South bearing 170° from Bartonsville, Frederick County, Maryland, United States [?]
9.8 km South bearing 174° from Spring Ridge, Frederick County, Maryland, United States
53.5 km Northwest bearing 331° from Washington, D. C., Washington, D.C., United States
62.7 km West bearing 273° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2025-09-08 23:55:47 UTC (37d 14h1m ago)
2025-09-08 19:55:47 EDT local time at Bartonsville, United States [?]
Altitude: 78 m
Position ambiguous: Precision reduced at transmitter by 1 digits, position resolution approximately 185.0 m.
Course:
Speed: 0 km/h
Device: Kenwood: TH-D74 (ht)
Last path: AC3JM-7>SYQX8Z via N3KTX-2*,WIDE1,WIDE2-1,qAR,N3TJJ-8 (good)
Positions stored: 640
Other SSIDs: AC3JM-1 AC3JM-9 AC3JM-12 AC3JM-10
About this site
This page shows real-time information collected from the Automatic Position Reporting System Internet network (APRS-IS). APRS is used by amateur (ham) radio operators to transmit real-time position information, weather data, telemetry and messages over the radio. A vehicle equipped with a GPS receiver, a VHF transmitter or HF transceiver and a small computer device called a tracker transmits it's location, speed and course in a small data packet, which is then received by a nearby iGate receiving site which forwards the packet on the Internet. Systems connected to the Internet can send information on the APRS-IS without a radio transmitter, or collect and display information transmitted anywhere in the world.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS